摘要
为了实现激光雷达系统对硬目标的探测,设计了相干探测系统,引入平衡探测器优化本振的大小,并对漫反射硬目标速度进行了探测。结果表明,采用平衡探测器,优化本振的大小,可以有效地提高系统的信噪比,对漫反射硬目标的速率探测平均误差为0.49m/s,测量速率的方差为0.91m/s,实现了系统对漫反射硬目标速度的相干探测。这一结果对于相干测风激光雷达的研制是有帮助的。
In order to realize coherent detection of speed of hard targets, a coherent system was designed with a balanced detector introduced to optimize the value of the local oscillator, and the speed of a diffusive hard target was detected. The result demonstrated that the signal to noise ratio of the system was efficiently improved with the balanced detector, the average speed accuracy of the hard target was about 0. 49m/s, variance of detection was 0.9l m/s, and this system made the coherent detection of the speed of a diffusive hard target. The outcome is useful for research of coherent wind lidar.
出处
《激光技术》
CAS
CSCD
北大核心
2012年第5期602-606,共5页
Laser Technology
基金
国家自然科学基金资助项目(41174130)
关键词
激光技术
激光雷达
相干探测
硬目标
速度探测
laser technique
lidar
coherent detection
hard target
speed detection